/**
 * Created by zby on 2018/4/28.
 */
public class CodeStandard {
    public static void main(String[] args) {
        StringBuffer buffer = new StringBuffer();
        buffer.append('S');
        buffer.append("tringBuffer");

        System.out.println(buffer.charAt(1));
        System.out.println(buffer.capacity());
        System.out.println(buffer.indexOf("tring"));
        System.out.println("buffer = " + buffer.toString());

        if (buffer.capacity() < 20) {
            buffer.append("1234567");
        }

        for (int i = 0; i < buffer.length(); i++) {
            System.out.println(buffer.charAt(i));
        }
    }
}